JPH011828A - Top-shaped block for ground stabilization and its installation method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a top-shaped block for ground stabilization in which a conical body is provided at the bottom of a flat drawing board, and a cylindrical shaft leg is provided at the center of the bottom of the body. and its installation method.

(Prior art) A top-shaped block balances the weight of the block itself, the vertical load it receives, and the total force of the ground reaction force and friction 41F resistance generated in the body and pivot legs, thereby preventing uneven settlement. It exerts horizontal ground bearing capacity and is used as a basic component in various ground stabilization and foundation reinforcement construction methods.

(Problems to be solved by the invention) Conventional block-shaped blocks are manufactured using approved Cenmet concrete materials, and no particular consideration is given to increasing the water permeability of the block itself.
When the pore water in the soft ground is pushed out to the upper part of the foundation ground and S, the block group installed in the F part of the foundation ground will further infiltrate into the L direction and escape to the outside or dissipate Fi. The interstitial water only escapes through the gravel layer between the block blocks.

In addition, conventional block-shaped blocks are made by pouring concrete into a frame-shaped molding frame in a T-field, curing and curing and removing the mold from the formwork, and the block itself is quite heavy. We had to be prepared for a considerable amount of labor in transporting and installing the foundation T$ to the site, and the cost of machinery and equipment such as cranes also increased.

Therefore, an object of the present invention is to drain water from the soft ground layer up to a certain depth from the installation surface of the block-shaped block not only from the filler gravel layer but also from the block-shaped blow 2 itself. The bearing capacity of the cable is exerted early, suppressing subsidence to a certain level, and stabilizing the ground at an early stage.In addition, since it is finally fabricated at the construction site, the labor during transportation and installation is reduced, and the Okawa River The purpose of the present invention is to provide a frame-shaped block and its AI construction method, which is difficult to use with mechanical equipment.

(L step for solving problem #2) Hereinafter, it will be explained using the reference numerals in the attached drawings. 1. The ground stabilizing block 10 of the present invention has a large number of through holes 17 on the circumferential surface. A water-permeable material 18 is attached to the top-shaped outer shell 16 provided with
A conical body 11 is provided at the bottom of the flat Mohi surface @12, and a cylindrical shaft 1113 is provided at the center of the bottom of the +1=4 body 11.

In addition, the installation method of the block-shaped block for ground stabilization of the present invention includes a block-shaped outer shell 16 provided with a large number of through holes 17 on the circumferential surface.
Insert the cylindrical shaft leg 13 into Xfa)*@l vertically,
A water-permeable material 18 is filled from the large-diameter opening on the front side of the outer shell 16, and the hardened water-permeable material 18 and the outer shell 16 are integrated to produce a water-permeable piece-shaped block 10 at a construction site. death,
The lower part of each piece-shaped block 10, 10... arranged in parallel is the basic J1! l! Insert it into the raft mat 30 installed on the board L and connect it to each other, and each frame-shaped block to, to,
... are interconnected by a raft union 40, and a permeable gravel layer 2 is packed between each piece-shaped block 10, 10....

(Embodiment) In the illustrated embodiment, a connecting reinforcing bar 15 is inserted into the top-shaped outer shell 16 so as to pass through the center of the body part and the pivot leg part, and the connecting reinforcing bar 15 is mainly made of a hardened water-permeable material 18. Parts have been buried. The bent and end portions 15a of the connecting reinforcing bars 15 protrude from the flat drawing board 12 of the top-shaped block IO.

When laying the top-shaped pro 7, a raft mat 30 is laid on the F side of the excavated foundation ground l. This raft mat 30 is
A plurality of vertical reinforcing bars 31 and a plurality of horizontal reinforcing bars 32 are arranged in parallel at intervals equal to the diameter of the large diameter end of the frame-shaped outer shell 16.
This is a cross-shaped reinforcing bar assembly made by welding the vertical reinforcing bars 31 and the horizontal reinforcing bars 32 at right angles, and diagonal reinforcing bars 33 are welded to the intersections of the vertical reinforcing bars 31 and the horizontal reinforcing bars 32 to provide triangular cedar sections 34.

Foundation ground 1 cleared with a body rammer etc. through the section 34
Insert the end of the pivot leg 13 of the top-shaped outer shell body 16 into the vertical hole, or directly push the pivot leg 13 into the foundation ground 1 without drilling such a vertical hole, using manual or mechanical power. Press the pivot leg 13 into the foundation l. When the ground is highly soft or a large load is applied.

The crushed stone is filled up to the tip of the end circle S1 portion 14.

The frame-increasing outer shell 16 planted in a straight shape is filled with a water-permeable material 18 such as cement concrete or resin concrete mixed with a foaming agent or a water-permeability imparting agent. Through hole 17
The diameter of the holes is set to be sufficiently smaller than the size of the aggregate, and as many holes as possible are provided throughout the outer shell 16. In order to reduce as much as possible the amount of mortar clarified from the through holes 17 before hardening and to minimize changes in the composition of the water-permeable concrete material 18, there is a need for work 1 due to changes in cost conditions such as still images. In order to suppress the spread, it is desirable to mix a hardening accelerator into the water-permeable material 18 and harden the water-permeable material 18 as early as 11 JI.

In this way 1. The frame-shaped protuberance 10 made of the base material 1IiIlH has a closed-cell or open-cell foam structure or a porous structure of the hardened water-permeable material 19 and a large number of through holes 17 in the outer shell 16. Therefore, it has sufficiently high water permeability compared to concrete blocks made by Kizutsu. In addition, even if some water-permeable material 18 flows out from the through hole 17, it will hang down to the foundation N1 or reach the outer surface of the shell 16, and will disturb the foundation N1 and part of the interfilling gravel layer 2. Since it is only a matter of configuring, actual + 15t = no problem.

A group of top-shaped blocks fixed to the foundation fit with the pivot legs 13 fitted into each section 34 of the raft mat 30 holds each flat panel 12 horizontally, and a raft union 40 is attached to the L portion thereof.
Place. This raft union 40 is made up of a plurality of longitudinal reinforcing bars 41 arranged in parallel at intervals equal to the diameter of the flattened L surface gl12.
This is a cross-shaped reinforcing bar assembly made by welding a plurality of horizontal reinforcing bars 42 at right angles.

The raft union 40 is fixed by welding or welding to one end 15a of a connecting reinforcing bar that is flat and protrudes from the center of the L surface 12 at the intersection of the vertical reinforcing bars 4 and the horizontal reinforcing bars 42. IH body with a group of top-shaped prongs planted on the foundation ground surface 11.
The gap between 11 and the gap between plane Vt and fi1.2.12 is filled with crushed stone, and is sufficiently filled with mechanical force such as a manual push rod or a bar vibrator, and then compacted with a condenser etc. As a result, a densely packed Ils layer 2 is formed.

By the above 1-, a foundation structure is constructed by laying frame-shaped blocks, and a gravel layer 2 of a certain thickness is provided as necessary on the L side of the block-shaped blocks 10.10... for building construction.
Foundation concrete 3 is poured. If there is not much time between the construction of the foundation structure using block blocks and the construction of the building, it is possible that tree removal from the soft ground is in progress, so the foundation concrete 3 may be By providing a communication path, it is possible to prevent wood from remaining in the saturated gravel layer 2 of the block type block lO pot,
Water removal and IN dispersion can be carried out more actively.

In this example, prior to laying the block-shaped blocks,
20.20 is constructed on the foundation q11, and the vertical wall 20.
The outermost top-shaped block 10 of the group of top-shaped blocks arranged between 20 is preferably in direct contact with the vertical wall 20 or in contact with it via a rigid body. In this way, the horizontal component of the ground reaction force in the outermost block is applied to the vertical wall 20 provided around the outer periphery of the block group.
On the other hand, between the top-shaped blocks other than the outermost block, the horizontal components of the ground reaction forces cancel each other out, so each top-shaped block io, i.

... are maintained in their original upright state without moving in the direction of the tree.

The vertical wall 20 can be constructed by driving plate-like members such as metal deck piles or concrete deck piles, pile members, etc. into the foundation ground l, but it can also be constructed from a reinforced concrete wall made by pouring concrete material into an excavated trench. You can also do it.

In addition, as a modification of the present invention, the step of filling and hardening the water-permeable material 18 into the top-shaped outer shell 16 is performed neither in a factory nor in the foundation ground to be laid.

Laying can also be carried out near the outside site.

(Effects of the Invention) As described below, the top-shaped block 10 of the present invention is produced by filling and hardening a water-permeable material 18 into a top-shaped outer shell 16 having a large number of through holes 17 on the circumference. Because it has high water permeability as a whole, it can be effectively used as a passage for pore water in the soft ground to penetrate into the -H section. By promoting tree removal in a soft ground layer to a deep depth, the required bearing capacity can be exerted in the ground layer at an early stage, subsidence can be suppressed to some extent, and the ground can be stabilized at an early stage.

In the installation method of the present invention, a plurality of block-shaped blocks 10. to... is Raft Union 40 and Raft Mat 3
Because each part of the lower body is tied to each other by 0,
Each pivot leg 13 is always maintained in a straight position, a part of the top block group is not locally tilted, and each body surface 11 is maintained symmetrically with respect to the vertical line. Therefore, on each fuselage surface ll, the free force of the ground reaction force is diverted to the buoyancy force for prevention of subsidence, and the horizontal force is canceled out. It is possible to maximize the difficult-to-understand characteristics of the top-shaped block.

In addition, since each top-shaped block io, io... is held straight and stably, the top-shaped blocks 10°10...
In between! The filling and compaction work of the j-layer 2 can be efficiently and reliably performed by using mechanical force such as a rod vibrator, and the interstitial water can permeate through the interstitial gravel layer 2 together with the block-shaped block lO and be discharged to the outside. It can be used effectively as a.

Furthermore, in the laying T method of the present invention, with the top-shaped outer shell 16 provided with a large number of through holes 17 fixed upright on the foundation q11,
A water-permeable material 18 is filled from the large-diameter opening on the h side of the outer shell 16, and the hardened water-permeable material 18 and the outer shell 16 are integrated to be used as a top-shaped block IO. The frame-shaped block 10 is finally produced at the construction site.

Therefore, even if the finished piece-shaped block is quite heavy as a whole, there is still an empty, relatively light piece-shaped outer shell 16 at the installation work site. All you have to do is install it with FI, so 21! The labor burden during transportation and installation is reduced, and mechanical equipment such as cranes is no longer required.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an outer shell of a top-shaped block according to an embodiment of the present invention, FIG. 2 is a perspective view of the outer shell filled with a water-permeable material and hardened, and FIG. A perspective view showing the relationship between the frame-shaped blocks, the raft mat, and the raft union; Fig. 4 is a longitudinal sectional view showing an example of the ground on which 41 of the frame-shaped blocks are installed; Fig. 5 is the state in which the frame-shaped blocks are laid. FIG. l...foundation ground, 2...filling gravel layer, 3...foundation concrete r, 10...frame-shaped block, 11...
114 conical bodies, 12... flat mohi drawing board, 13... cylindrical shaft leg, 14... lower end conical part, 15... connecting reinforcing bar, 16... top-shaped outer shell body, 17... ...Through hole, 18...
・Water permeable material, 20... Vertical wall, 30... Raft mat, 31... Vertical reinforcing bar, 32... Horizontal reinforcing bar, 33... Diagonal reinforcing bar, 34... Pivot leg insertion section , 40... Raft union, 41... Vertical reinforcing bar, 42... Yokotetsu Patented Junjin Co., Ltd. Mykoma Seven

Claims (2)

[Claims] (1) Top-shaped outer shell 1 with a large number of through holes 17 on the circumference
6 is filled with a water-permeable material 18 and hardened, a conical body 11 is provided at the lower part of a flat upper board 12, and a cylindrical shaft leg 13 is provided at the center of the lower part of the body 11. (2) Top-shaped outer shell 1 with a large number of through holes 17 on the circumference
The cylindrical shaft leg 13 of No. 6 is inserted perpendicularly into the foundation ground 1, and the water-permeable material 18 is filled through the large-diameter opening on the upper surface of the outer shell 16, and the hardened water-permeable material 18 and the outer shell 16 are By making an integrated water-permeable top-shaped block 10 at a construction site, and inserting the lower part of each of the plurality of block-shaped blocks 10, 10... arranged in parallel into the raft mat 30 installed on the foundation ground 1. Each piece-shaped block 10, 10・
A construction method for installing block blocks for ground stabilization, in which the upper parts of ... are interconnected by a raft union 40, and a permeable gravel layer 2 is packed between each block block 10, 10....